Cooling apparatus for on-vehicle electronic device

ABSTRACT

A cooling apparatus for cooling an electronic device  100  mounted on a vehicle in combination with an automotive climate control system  10  having a refrigeration cycle for compressing and expanding a first heating medium is disclosed. The cooling apparatus includes a second heating medium in liquid form, a tubular path  60  for circulating the second heating medium flowing therein, a heat absorber  30  for transmitting the heat from the electronic device  100  to the second heating medium, a heat dissipator  40  for transmitting the heat from the second heating medium to the evaporator  15 , and a pump  50  for circulating the second heating medium. The heat dissipator  40  is coupled to the tank unit  15   c  of the evaporator  15.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a cooling apparatus for cooling an object tobe cooled such as an electronic device mounted on a vehicle incombination with an automotive climate control system, or in particularto a cooling apparatus using brine as a heat transfer medium.

2. Description of the Related Art

The evaporator of an automotive climate control system exchanges heatbetween refrigerant flowing in the evaporator and air in the passengercompartment. A cooling apparatus for cooling an on-vehicle object usingthis evaporator is known as disclosed in Japanese Unexamined PatentPublication No. 2001-1753. Japanese Unexamined Patent Publication No.2001-1753 describes an air conditioning system having a cooling storagecycle for cooling a cool storage medium to supply cool air even when thevehicle engine is stopped. This cooling storage cycle uses brine as aheat transfer medium, and evaporator tubes are integrated as a doubletube, in which the refrigerant flows in the inner tube while brine flowsin the outer tube, so that the brine is cooled thereby cooling thecooling storage medium making up the object to be cooled.

SUMMARY OF THE INVENTION

The brine in the cooling storage cycle described above cools the coolingstorage medium satisfactorily. The brine flowing in the outer tube ofthe double tube, however, constitutes a thermal resistance against heatexchange between the refrigerant and air in the passenger compartment,with the result that the quick-acting characteristic of the coolingoperation of the climate control system may be deteriorated. Also, theprocess of integrally forming a double tube is complicated, and anevaporator having such a double tube is specially structured andexpensive.

This invention has been achieved to solve the aforementioned problem ofthe prior art and the object thereof is to provide a cooling apparatusfor cooling the object to be cooled such as an on-vehicle electronicdevice in combination with an automotive climate control system withoutdeteriorating the quick-acting cooling characteristic of the automotiveclimate control system.

In order to achieve the object described above, the present inventionemploys the technical means described below.

According to this invention, there is provided a cooling apparatus forcooling an object to be cooled (100) mounted on the vehicle incombination with an automotive climate control system (10) having arefrigeration cycle for compressing and expanding a first heatingmedium,

-   -   wherein the climate control system (10) includes an evaporator        (15) having a plurality of juxtaposed tubes with the first        heating medium flowing therein and a tank unit (15 c) connected        to the ends of the plurality of tubes for distributing and        collecting the first heating medium to and from the plurality of        tubes, and in which an evaporator exchanges heat between air        blown by a blower (16) of the climate control system (10) and        the first heating medium, the cooling apparatus including a        second heating medium in liquid form, a tubular path (60) for        circulating the second heating medium flowing therein, a heat        absorber (30) for transmitting the heat from the object (100) to        the second heating medium, a heat dissipator (40) for        transmitting the heat from the second heating medium to the        evaporator (15), and a pump (50) for circulating the second        heating medium, the heat dissipator (40) being coupled to the        tank unit (15 c) of the evaporator (15).

The heat dissipator of the cooling apparatus, which is coupled to thetank unit of the evaporator of the climate control system, has noadverse effect on heat exchange between the first heating medium(refrigerant) flowing inside the tubes and air blowing between the tubesand fins of the evaporator, and therefore, the quick-acting coolingcharacteristic of the climate control system is not deteriorated. Also,even in the case where the climate control system is not being operatedwith no refrigerant flowing in the evaporator, heat can be normallyradiated using an evaporator formed of aluminum as a heat radiatorhaving a large surface area.

According to this invention, the second heating medium in liquid form isbrine having a solidification point of lower than 0° C., and therefore,can be prevented from being frozen even in a cold environment.

According to this invention, the heat dissipator (40) is configuredindependently of the evaporator (15) and coupled to by being mounted onthe tank unit (15 c) of the evaporator. With this configuration, theevaporator used for the cooling apparatus according to the invention canbe realized with a minor design change or without any design change ofthe existing evaporator.

According to this invention, the cooling apparatus may comprise aplurality of heat dissipators (40), the evaporator (15) may include aplurality of tank units (15 b, 15 c) connected to the each end of thetubes, and the plurality of the heat dissipators (40) are coupled to theplurality of the tank units (15 b, 15 c). As a result, a more uniformtemperature distribution of the core unit of the evaporator is obtainedand the cooling capacity of the cooling apparatus is improved.

According to this invention, the cooling apparatus may further comprisea temperature sensor (70) for detecting the temperature (Tb) of thesecond heating medium, and a control unit (80) for activating the blower(16) of the climate control system (10) when the temperature (Tb)detected by the temperature sensor (70) reaches a predeterminedtemperature (T1).

With this configuration, even in the case where the climate controlsystem is not being operated and no refrigerant is flowing in theevaporator, heat transmitted to the evaporator from the heat dissipatorsof the cooling apparatus can be efficiently radiated by applying the airof the blower to the evaporator.

According to this invention, the climate control system (10) includes anair blowing unit case (17) having a heat discharge outlet port (25) foraccommodating the evaporator (15) and the blower (16) and adapted to beopened or closed, and the control unit (80) controls the heat dischargeoutlet port (25) to open upon activation of the blower (16). As aresult, even in the case where the climate control system is not beingoperated and the cool air outlet of the air blowing unit case is closed,the blower can be activated of the cooling apparatus.

According to this invention, the control unit (80) controls the pump(50) to reduce the flow rate of the second heating medium in liquid formwhen the temperature (Tb) detected by the temperature sensor (70) dropsto or below a predetermined temperature (T3). As a result, condensationor the like, which otherwise might be caused by excessively cooling theelectronic device can be prevented.

According to this invention, the cooling apparatus further comprises aflow rate control valve, and the control unit (80) controls the flowrate control valve in place of the pump (50). As a result, condensationor the like, which otherwise might be caused by excessively cooling theelectronic device can be prevented.

According to this invention, the cooling apparatus may further comprisea second temperature sensor (72) for detecting the temperature (Tk) ofthe heat absorber (30), wherein the tubular path (60) for circulatingthe second heating medium in liquid form includes a tubular bypass (61)for circumventing the heat absorber (30) and a switching valve (62)arranged at a diverging point of the tubular bypass (61), and whereinthe control unit (80) activates the switching valve (62) in such amanner that the second heating medium in liquid form circumvents theheat absorber (30) and flows through the tubular bypass (61) when thetemperature (Tb) detected by the temperature sensor (70) drops to orbelow a predetermined temperature (T3) and the second heating mediumflows through the heat absorber (30) when the temperature (Tk) detectedby the second temperature sensor (72) rises to or above anotherpredetermined temperature (T5). As a result, condensation or the like,which otherwise might be caused by excessive cooling of the electronicdevice can be also prevented.

According to this invention, the cooling apparatus may further comprisea temperature sensor (70) for detecting the temperature (Tb) of thesecond heating medium and a control unit (80) for activating the blower(16) of the climate control system (10) when the temperature (Tb)detected by the temperature sensor (70) reaches a predeterminedtemperature (T1), wherein the climate control system (10) includes anair blowing unit case (17) for accommodating the evaporator (15) and theblower (16) and having a heat discharge outlet (25) adapted toopen/close, wherein the air blowing unit case (17) includes an externalair inlet (19), an internal air inlet (18) and an internal/external airswitching door (20) for opening/closing the external air inlet (19) andthe internal air inlet (18), wherein in the case where the temperature(Tb) detected by the temperature sensor (70) while the vehicle isrunning at a predetermined speed or higher reaches a predeterminedtemperature (T1), the control unit (80) controls the operation of theinternal/external air switching door (20) to introduce air from theexternal air inlet (19) while at the same time opening the heatdischarge outlet port (25). As a result, the heat from the heatdissipator of the cooling apparatus can be radiated by cooling theevaporator with air flow caused by driving the vehicle withoutactivating the blower.

Incidentally, the reference numeral in each parenthesis attached to eachname of the means described above shows an example of correspondencewith the specific means described in the embodiments below.

The present invention may be more fully understood from the descriptionof preferred embodiments of the invention, as set forth below, togetherwith the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram showing the cooling apparatus according toa first embodiment of the invention, and the cooling circuit of theclimate control system collaborating with the cooling apparatus.

FIG. 2 is a schematic diagram showing the state in which the heatdissipator of the cooling apparatus is coupled to the evaporator of theclimate control system.

FIG. 3 is a schematic diagram showing the state in which the heatdissipator of the cooling apparatus according to a second embodiment ofthe invention is coupled to the evaporator of the climate controlsystem.

FIG. 4 is a schematic diagram showing the cooling circuit of the coolingapparatus according to a third embodiment and the air blowing unit caseand the blower of the climate control system.

FIG. 5 is a schematic diagram showing the cooling circuit of the coolingapparatus according to a fourth embodiment and the air blowing unit caseand the blower of the climate control system.

FIG. 6 is a control flowchart for the cooling apparatus according to thefourth embodiment.

FIG. 7 is a schematic diagram showing the cooling circuit of the coolingapparatus according to a fifth embodiment of the invention.

FIG. 8 is a control flowchart for the cooling apparatus according to thefifth embodiment.

FIG. 9 is a schematic diagram showing the cooling circuit of the coolingapparatus according to a sixth embodiment and the air blowing unit caseand the blower of the climate control system.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference to the accompanying drawings, a preferred firstembodiment of the invention will be explained in detail. The coolingapparatus 1 according to the first embodiment is for cooling anelectronic device mounted on a vehicle and configured to radiate heatgenerated in the electronic device to the evaporator of an automotiveclimate control system. FIG. 1 is a schematic diagram showing thecooling apparatus 1 according to the first embodiment and the climatecontrol system 10 collaborating with the cooling apparatus 1. Withreference to FIG. 1, the climate control system 10 includes,interconnected by tubes, a compressor 11 for compressing a first heatingmedium (hereinafter referred to as the refrigerant), a condenser 12 forcondensing and liquefying by cooling the refrigerant compressed into ahigh temperature by heat exchange with the atmospheric air, a liquidtank 13 for separating the refrigerant into a liquid and gas, anexpansion valve 14 for expanding the refrigerant, and an evaporator 15for exchanging heat between the low temperature refrigerant and the airin the passenger compartment. The refrigerant flows in the tubular pathsin the direction of the white arrows. The evaporator 15 is accommodatedin an air blowing unit case 17 together with a blower 16 for blowing airto the evaporator 15. An internal air inlet 18, an external air inlet 19and an internal/external air switching door 20 for opening/closing theseinlets are arranged upstream of the blower 16 of the air blowing unitcase 17. A heater core 21 for the heating operation, an air outlet 22directed toward the upper half bodies of the vehicle occupants, an airoutlet 23 directed to the feet of the occupants, a defroster air outlet24, a heat discharge air outlet 25, doors 26, 27, 28 for opening/closingthese air outlets and an auto/manual switching door 29 are arrangeddownstream of the evaporator 15.

The evaporator 15 according to this embodiment is of an ordinary typecalled a “drone cup” used for the automotive climate control system, andtherefore, only a general structure thereof is shown in FIG. 2. As shownin FIG. 2, the evaporator 15 includes a core unit 15 a formed of amultiplicity of fins and tubes arranged in alternate layers in thevertical direction of the drawing, an upper tank unit 15 b and a lowertank unit 15 c connected to the upper and lower ends, respectively, ofthe plurality of the tubes and extending in the horizontal direction inthe drawing to distribute the refrigerant to and collect the refrigerantfrom the plurality of the tubes, and a refrigerant inlet port 15 d and arefrigerant outlet port 15 e. Although the evaporator 15 according tothis embodiment has upper and lower tank units, the invention mayalternatively employ an evaporator having a tank unit on one side, or onthe lower side thereof.

In the cooling apparatus 1 according to the first embodiment, as shownin FIG. 1, the on-vehicle electronic device 100 is cooled by circulatinga second heating medium in liquid form flowing in the directions of theblack arrows between the high-temperature on-vehicle electronic device100 and the low-temperature evaporator 15. According to this embodiment,the second heating medium in liquid form is brine having asolidification point of lower than 0° C. The cooling apparatus 1 isconfigured of, connected by a tubular path 60, a heat absorber 30 fortransmitting heat from the electronic device 100 to the brine, a heatdissipator 40 for transmitting heat from the brine to the evaporator 15and a pump 50 for circulating the brine.

The heat dissipator, as designated by reference numeral 40 in FIG. 2,includes a heat dissipator case 41 formed of aluminum substantially inthe shape of a parallelepipedal box, and a brine inlet port 42 and abrine outlet port 43 arranged on the opposed side surfaces of the heatdissipator case 41. The brine is filled and flows in the space formed inthe case. The heat dissipator 40 has one large-area side of theparallelepiped thereof brazed or caulked fixedly in close contact on thebottom surface of the lower tank unit 15 c of the evaporator. The use ofthe lower tank unit 15 c causes the refrigerant stored therein toexhibit a function equivalent to a heat pipe, and therefore, improvementin cooling capacity is expected.

The heat absorber 30, though not shown in detail, like theaforementioned heat dissipator 40, includes a heat absorber case formedof aluminum substantially in the shape of a parallelepipedal box, and abrine inlet port and a brine outlet port arranged on the opposed sidesurfaces of the case. The brine is filled and flows in the space formedin the case. The heat absorber case has one side surface thereof fixedin contact with the high-temperature parts of the electronic device 100with a band or the like to receive heat therefrom. For this purpose,fixing means such as a screw may be used in accordance with thestructure of the electronic device 100 to be cooled, or depending on thecooling conditions, the heat absorber unit case may be placed in acasing of the electronic device, surrounded by high-temperature air butnot in contact with any heat-generating parts thereof.

The operation of the cooling apparatus 1 according to this embodimentwill now be explained. The heat generated in the electronic device 100is transmitted to the brine through the heat absorber 30, and the brineis sent to the heat dissipator 40 by the pump 50. The heat contained inthe brine is transmitted to the low-temperature refrigerant in the lowertank unit 15 c of the evaporator through one side of the heat dissipatorcase 41 and the bottom of the lower tank unit 15 c thereby to cool theelectronic device 100.

The heat transmission explained above concerns a case in which thecompressor 11 of the climate control system 10 is activated and thelow-temperature refrigerant flows in the evaporator 15. Nevertheless,the cooling apparatus 1 according to the invention can cool theelectronic device 100 even when the compressor 11 of the climate controlsystem is not being operated. Specifically, in a case where thecompressor 11 is not in operation, the temperature of the evaporator 15is substantially equal to ambient air temperature. However, since theelectronic device 100 generates heat, the temperature thereof is higherthan ambient air temperature, as well as the temperature of the brinefor transmitting the heat of the electronic device 100. Thus, heatcontained in the brine of the heat dissipator 40, after beingtransmitted to the metal case forming the lower tank unit 15 c of theevaporator and the tubes and fins of the evaporator, is dissipated intoambient air thereby to cool the electronic device 100. The core unit ofthe evaporator has a large surface area, and therefore, the evaporator,even if no refrigerant flows therein, can be used as a heat radiator.Also, heat transmitted from the brine to the evaporator 15 is not onlyradiated from the evaporator 15 by the natural cooling function of air,but also can be radiated efficiently by being forcibly cooled by airblown from the blower 16 to the evaporator 15. As another alternative,without activating the blower 16, heat can be radiated forcibly byatmospheric air introduced and blown to the evaporator 15 while thevehicle is moving.

The heat dissipator of the cooling apparatus according to the firstembodiment described above is mounted on and coupled to the lower tankunit of the evaporator. Alternatively, the heat dissipator case and thelower tank unit of the evaporator may be formed integrally with eachother. In such a case, contact heat resistance which otherwise might begenerated between the independent heat dissipator 40 and the lower tankunit according to the first embodiment is eliminated, and therefore heatconductivity is improved.

A cooling apparatus 2 according to a second embodiment will not beexplained with reference to FIG. 3. FIG. 3 is a schematic diagramshowing a state in which the heat dissipators 40 are coupled to theevaporator 15. The cooling apparatus 2 according to this embodimentincludes two heat dissipators 40 mounted on the lower tank unit 15 c andthe upper tank unit 15 b, respectively. As a result, a more uniformtemperature distribution of the core unit 15 a of the evaporator isobtained and cooling capacity improved. Incidentally, since the brine issupplied to the two heat dissipators 40 from a single heat absorber, adiverging point (not shown) is formed midway of the tubular path 60.

A cooling apparatus 3 according to a third embodiment will now beexplained with reference to FIG. 4. In FIG. 4, the compressor, thecondenser and the like making up the refrigeration cycle of the climatecontrol system are not shown. The cooling apparatus 3 according to thethird embodiment includes a temperature sensor 70 and a control unit 80in addition to the cooling apparatus according to the first embodiment.Further, the cooling apparatus 3 includes three heat absorbers 30. Thetemperature sensor 70 is arranged midway of the tubular path 60 leadingfrom the heat dissipator 40 to the heat absorber 30 to detect the brinetemperature, and the control unit 80 can receive a signal from thetemperature sensor 70. Also, the three heat absorbers 30 are mounted onthree electronic devices 100, respectively.

The control unit 80 activates the blower 16 in the air blowing unit case17 in accordance with temperature detected by the temperature sensor 70while the compressor is not being operated. Specifically, in a casewhere the brine temperature Tb rises to a predetermined temperature T1or higher, the blower 16 is activated to forcibly cool the evaporator 15by air, however when the detected temperature Tb drops to apredetermined temperature T2 lower than the predetermined temperatureT1, the blower 16 is stopped. Also, the control unit 80 activates anelectric motor (not shown) for opening the door 28 on the heat dischargeoutlet 25 at the same time as the blower 16. In order to reduce thefailure rate of the blower motor 16 a, the r.p.m. of the blower 16 maybe increased or decreased without starting/stopping the blower 16 asdescribed above. Also, the brine temperature may be measured at otherpoints than the aforementioned points. For example, the temperature ofthe brine in the heat absorber 30 or the heat dissipator 40 may bemeasured, or the temperature of the case of the heat absorber or theheat dissipator may be measured as the brine temperature. As anotheralternative, the temperature of the electronic device 100 may bemeasured by a temperature sensor.

A cooling apparatus 4 according to a fourth embodiment will now beexplained with reference to FIG. 5. When the climate control system isoperating to cool the passenger compartment, i.e. when both thecompressor and the blower 16 are in operation, the cooling power of thecooling apparatus 4 is maximised. An excessive cooling operation,however, may reduce the surface temperature of the electronic device 100below ambient air temperature and may form condensation on theelectronic device 100. In view of this, with the cooling apparatus 4according to the fourth embodiment, the control unit 80 further has thefunction of adjusting the output of the pump 50 and thus regulate theflow rate of the circulating brine. As a result, the electronic device100 is prevented from excessively decreasing in temperature and formingcondensation. In a case where the brine temperature Tb detected by thetemperature sensor 70 drops to a predetermined temperature T3 or lower,the control unit 80 decreases the pump output and thus reduces the flowrate of the circulating brine, however when the temperature Tb rises toa predetermined temperature T4 or higher, the pump output is increasedfor an increased flow rate. Incidentally, the temperature T3 isdetermined by comparing the internal air temperature Ta detected by theinternal air temperature sensor 71 normally held in the climate controlsystem with the brine temperature Tb, and therefore, the temperature T3changes according to internal air temperature Ta.

A control flowchart of the cooling apparatus according to the fourthembodiment is shown in FIG. 6. As shown in FIG. 6, the control unit 80controls the on/off operation of the blower for the cooling apparatusand the on/off operation of the heat discharge outlet when thecompressor and the blower of the climate control system are not beingoperated, and controls the flow rate of the brine when the compressorand the blower of the climate control system are both in operation.

Instead of controlling the flow rate of the circulating brine bycontrolling the output of the pump 50 as in the cooling apparatus 4according to the fourth embodiment, a flow rate control valve may bearranged in the brine circulating path, and the flow rate may becontrolled by the control unit 80 adjusting the valve opening degree ofthe flow rate control valve.

A cooling apparatus 5 according to a fifth embodiment will now beexplained with reference to the schematic diagram of FIG. 7 and theflowchart of FIG. 8. In FIG. 7, neither the compressor and the condensermaking up the refrigeration cycle of the climate control system nor theair blowing unit case and the blower are shown. The cooling apparatus 5,like the cooling apparatus according to the fourth embodiment, cancontrol the on/off operation of the blower and the flow rate of thebrine to prevent excessive cooling. In the cooling apparatus 5, thetubular bypass 61 circumventing the heat absorbers 30 is formed in thetubular path 60 of the brine, and a three-way valve 62 is arranged atthe diverging point of the tubular bypass 61. Further, the coolingapparatus 5 according to this embodiment, in addition to the firsttemperature sensor 70 for detecting the brine temperature, includes asecond temperature sensor 72 for detecting the temperature Tk of thecase of one of the three heat absorbers 30 which is coupled to theelectronic device 100 having the lowest allowable temperature. In a casewhere the brine temperature Tb drops to a predetermined temperature T3or lower, the control unit 80 switches the three-way valve 62 so thatthe brine flows in the tubular bypass 61, however when the temperatureTk of the case of the heat absorber 30 detected by the secondtemperature sensor 72 rises to another predetermined temperature T5 orhigher, on the other hand, the three-way valve 62 is switched so thatthe brine flows in the heat absorbers 30.

A cooling apparatus 6 according to a sixth embodiment will now beexplained with reference to FIG. 9. The cooling apparatus 6 according tothis embodiment, like the cooling apparatus according to the thirdembodiment, includes a brine tubular path 60, heat absorbers 30, a heatdissipator 40, a pump 50, a temperature sensor 70 and a control unit,but differs from the cooling apparatus according to the third embodimentin that in this embodiment, the evaporator 15 is cooled using the airflow caused by a running vehicle. Assuming that the vehicle is moving ata higher than predetermined speed with the compressor and the blower 16not in operation. The cooling apparatus according to the sixthembodiment operates so that in the case where the brine temperature Tbrises to a predetermined temperature T1 or higher, the internal/externalair switching door 20 of the air blowing unit case 17 is switched tointroduce atmospheric air in accordance with a command from the controlunit 80. Also, the control unit 80 activates an electric motor (notshown) to open the door 28 of the heat discharge outlet 25 when theinternal/external switching door 20 is switched to introduce atmosphericair. As a result, the evaporator 15 and the brine are forcibly cooled byair flow caused by a moving vehicle.

While the invention has been described by reference to specificembodiments chosen for purposes of illustration, it should be apparentthat numerous modifications could be made thereto by those skilled inthe art without departing from the basic concept and scope of theinvention.

1. A cooling apparatus for cooling an object to be cooled mounted on avehicle in combination with an automotive climate control system havinga refrigeration cycle for compressing and expanding a first heatingmedium, wherein the climate control system includes an evaporator havinga plurality of juxtaposed tubes with a first heating medium flowingtherein and a tank unit connected with the ends of the plurality of thetubes for distributing and collecting the first heating medium in theplurality of the tubes, the evaporator exchanges heat between air blownby the blower of the climate control system and the first heatingmedium; the cooling apparatus comprising a second heating medium inliquid form, a tubular path for circulating the second heating mediumflowing therein, a heat absorber for transmitting the heat from theobject to the second heating medium, a heat dissipator for transmittingthe heat from the second heating medium to the evaporator, and a pumpfor circulating the second heating medium, the heat dissipator beingcoupled to the tank unit of the evaporator.
 2. The cooling apparatusaccording to claim 1, wherein the second heating medium in liquid formis brine having a solidification point of lower than 0° C.
 3. Thecooling apparatus according to claim 1, wherein the heat dissipator is aunit independent of the evaporator and mounted on and coupled to thetank unit of the evaporator.
 4. The cooling apparatus according to claim1, comprising a plurality of heat dissipators, wherein the evaporatorincludes a plurality of tank units connected to the each end of thetubes, and the plurality of the heat dissipators are coupled to theplurality of the tank units.
 5. The cooling apparatus according to claim1, further comprising a temperature sensor for detecting the temperatureof the second heating medium and a control unit for activating theblower of the climate control system when the temperature detected bythe temperature sensor reaches a predetermined temperature.
 6. Thecooling apparatus according to claim 5, wherein the climate controlsystem includes an air blowing unit case for accommodating theevaporator and the blower and having a heat discharge outlet adapted tobe opened or closed, and the control unit controls the heat dischargeoutlet to open upon activation of the blower.
 7. The cooling apparatusaccording to claim 5, wherein the control unit controls the pump toreduce the flow rate of the second heating medium in liquid form whenthe temperature detected by the temperature sensor drops to or below apredetermined temperature.
 8. The cooling apparatus according to claim7, further comprising a flow rate control valve, wherein the controlunit controls the flow rate control valve in place of the pump.
 9. Thecooling apparatus according to claim 5, further comprising a secondtemperature sensor for detecting the temperature of the heat absorber,wherein the tubular path for circulating the second heating medium inliquid form includes a tubular bypass for circumventing the heatabsorber and a switching valve arranged at a diverging point of thetubular bypass, and wherein the control unit activates the switchingvalve in such a manner that the second heating medium in liquid formcircumvents the heat absorber and flows through the tubular bypass whenthe temperature detected by the temperature sensor drops to or below apredetermined temperature, and the second heating medium flows throughthe heat absorber when the temperature detected by the secondtemperature sensor rises to or above another predetermined temperature.10. The cooling apparatus according to claim 1, further comprising atemperature sensor for detecting the temperature of the second heatingmedium and a control unit for activating the blower of the climatecontrol system when the temperature detected by the temperature sensorreaches a predetermined temperature, wherein the climate control systemincludes an air blowing unit case for accommodating the evaporator andthe blower and having a heat discharge outlet adapted to open/close,wherein the air blowing unit case includes an external air inlet, aninternal air inlet and an internal/external air switching door foropening/closing the external air inlet and the internal air inlet,wherein in the case where the temperature detected by the temperaturesensor while the vehicle is moving at a predetermined speed or higherreaches a predetermined temperature, the control unit controls theoperation of the internal/external air switching door to introduce airfrom the external air inlet while at the same time opening the heatdischarge outlet.
 11. The cooling apparatus according to claim 1,wherein the object to be cooled is an electronic device mounted onvehicle.